Made from borosilicate 4.0 glass Features: 1) Made from borosilicate 4.0 glass 2) Lighting tubing: horn-shape and vent-pipe3) Specifications: a) Mercury lighting: BT70, BT75, BT80, BT90 and BT120b) Sodium lighting: BT62, T37.5 x 180, T37.5 x 208, T46 x 220, T46 x 265 and T46 x 290 c) Halogen lighting: ED55, ED75, ED90 and ED120